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Production of spin-1/2 particles in inhomogeneous cosmologies

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The production of spin-½ particles by small gravitational inhomogeneities is discussed by using a perturbative approach based on the evaluation of the scattering matrix. We compute the production of massive and massless particles by linear gravitational inhomogeneities in flat spacetime and the production of massless particles in an expanding universe described by the spatially flat Friedmann-Robertson-Walker models with small inhomogeneities. As in the case of scalar particles the total pair-creation probability is given in terms of geometric invariants of the spacetime.

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Published for the American Physical Society by the American Institute of Physics

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Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevD.45.4428

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Articles publicats en revistes (Física de la Matèria Condensada)

# metadata.dc.title[].value
Production of spin-1/2 particles in inhomogeneous cosmologies